diff --git a/deepdoc/parser/txt_parser.py b/deepdoc/parser/txt_parser.py
index 92f6f3299..1b22865e1 100644
--- a/deepdoc/parser/txt_parser.py
+++ b/deepdoc/parser/txt_parser.py
@@ -31,6 +31,7 @@ class RAGFlowTxtParser:
             raise TypeError("txt type should be str!")
         cks = [""]
         tk_nums = [0]
+        delimiter = delimiter.encode('utf-8').decode('unicode_escape').encode('latin1').decode('utf-8')
 
         def add_chunk(t):
             nonlocal cks, tk_nums, delimiter